Ⅰ.单句语法填空
1．You can't imagine the difficulty he had passing(pass)the exam.
2．There's a limit to the amount of pain we can bear.
3．She looked at me in confusion(confuse) and didn't answer my question.
4．So far large quantities of information have been stored(store) in the computer.
5．She observed a man walking(walk) on the opposite side of the road.
6．It's stupid to risk doing(do) anything that might lead to failure.
7．I got a master's degree through distance(distant) learning.
8．The question is so hard，and we're getting confused(confuse)．
9．I don't wonder you were anxious(anxiety) about their safety.
10．The twin brothers are alike in appearance but differ greatly in character.
